Berikut adalah artikel tentang cara mengatasi Call to undefined function mysqli_init() di CodeIgniter saat hosting:
Resolving "Call to undefined function mysqli_init()" in CodeIgniter on Hosting
The dreaded "Call to undefined function mysqli_init()" error in CodeIgniter often strikes when deploying your application to a hosting server. This error indicates that the mysqli extension, essential for database interaction using MySQLi, isn't enabled on your server. Let's dive into how to troubleshoot and fix this.
Understanding the Problem
CodeIgniter, a popular PHP framework, relies on various PHP extensions for functionality. The mysqli extension provides a more object-oriented way to interact with MySQL databases compared to the older mysql extension (which is now deprecated). When this extension is missing, CodeIgniter can't connect to your database, throwing the Call to undefined function mysqli_init() error.
Identifying the Root Cause
Before jumping into solutions, pinpoint the problem's origin:
1. Server-Side Issue:
The most common reason is that the mysqli extension is not enabled on your hosting server's PHP configuration. This is entirely out of your control; you'll need to contact your hosting provider.
2. Incorrect PHP Version:
Ensure your CodeIgniter application is using a PHP version that supports the mysqli extension. Older PHP versions might lack this crucial feature. Check your hosting control panel or contact support for clarification.
3. Incorrect Configuration File:
Rarely, a misconfigured php.ini file (or its equivalent) within your application's directory could interfere. This is less likely on shared hosting but worth checking if you have access to server-side configurations.
Solutions and Troubleshooting Steps
Here's a breakdown of how to tackle this error:
1. Contact Your Hosting Provider:
This is the first and most crucial step. Inform your hosting provider about the error. They have the tools and access to enable the mysqli extension on your server. They might also suggest alternative solutions depending on your hosting plan and server configuration.
2. Check Your PHP Version and Extension Support:
Utilize a PHP info script to verify your server's PHP version and installed extensions. Create a simple PHP file containing <?php phpinfo(); ?> and upload it to your web server. Look for "mysqli" within the output. If it's absent, that's the primary issue.
3. Database Configuration in CodeIgniter:
Double-check your CodeIgniter database configuration file (application/config/database.php). Ensure that the $db['default']['dbdriver'] setting is correctly set to mysqli. This configures the framework to utilize the mysqli extension. A typo or an incorrect setting can lead to unexpected behavior.
4. Alternative Database Driver (if feasible):
If switching to mysqli isn't immediately possible due to server limitations, consider using a different database driver supported by CodeIgniter and your hosting environment. However, this is generally a less preferred solution because mysqli is generally faster and more efficient.
Prevention and Best Practices
To avoid this issue in the future, follow these best practices:
- Thorough Testing: Always thoroughly test your CodeIgniter application on a staging or development server that closely mirrors your production environment.
- Clear Communication: Maintain clear communication with your hosting provider about your application's requirements. Knowing that you need the
mysqliextension is critical when selecting a hosting provider. - Version Control: Use a version control system (like Git) to track code changes. This makes reverting to previous working versions easier if issues arise during deployment.
By following these steps, you should be able to efficiently resolve the "Call to undefined function mysqli_init()" error in your CodeIgniter application and ensure smooth database connectivity. Remember, proactive communication with your hosting provider is key to swift resolution.
